


Great Lakes Forecast
Issued by NWS
Issued by NWS
820 FZUS61 KBUF 142002 GLFSL Forecast for the Saint Lawrence River including the Thousand Islands Region National Weather Service Buffalo NY 402 PM EDT Sun Sep 14 2025 SLZ022-024-150300- Saint Lawrence River from Cape Vincent to Saint Regis 402 PM EDT Sun Sep 14 2025 .TONIGHT...North winds 10 knots or less becoming northeast. Mainly clear through the early overnight, then becoming partly cloudy. .MONDAY...Northeast winds less than 10 knots. Sunny. .MONDAY NIGHT...Northeast winds less than 10 knots. Mainly clear. .TUESDAY...Light and variable winds. Sunny. .TUESDAY NIGHT...Light and variable winds. Mainly clear. .WEDNESDAY...South winds less than 10 knots. Partly cloudy. .THURSDAY...Southwest winds 10 knots or less becoming northwest. A chance of showers Thursday night. .FRIDAY...North winds 5 to 10 knots. A chance of showers during the day. $$